JP2013051457A - Speaker fixation structure of liquid crystal television - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker fixation structure of a liquid crystal television which easily and securely fixes a speaker without using machine screws or the like and prevents vibration noise caused by the speaker.SOLUTION: Cushion materials 5A, 5B are adhered to a front surface and a rear surface of a speaker box 1a, and the speaker box 1a is held by a rear frame 3a of a liquid crystal display module 3 internally disposed in a liquid crystal television 2 and a rear cabinet 4 of the liquid crystal television from front and rear sides through the cushion materials 5A, 5B to be fixed. Vibrations of the speaker 1 is absorbed and attenuated by the cushion materials 5A, 5B so as not to be transmitted to the rear frame 3a and the rear cabinet 4, and thus the occurrence of vibration noise is prevented. Further, when the speaker is held and fixed, machine screws or the like becomes unnecessary and the speaker 1 is easily and securely fixed.

Description

  The present invention relates to a speaker fixing structure of a liquid crystal television, and more particularly to a speaker fixing structure that can prevent “buzzing noise” of each part of the liquid crystal television caused by vibration of the speaker.

  Many conventional LCD TV speakers are firmly fixed with screws to a liquid crystal TV cabinet or a liquid crystal display module inside the liquid crystal TV. However, if the speaker is firmly fixed with a screw, the vibration of the speaker is directly transmitted to the cabinet or the liquid crystal display module, so there is a problem that so-called “billing noise” is likely to occur, and the fixing work with the screw is troublesome. There was a problem that the machine bill was expensive.

  On the other hand, the speaker unit is arranged between the wall panel and the speaker mounting part, the fixing bracket for the speaker unit is fixed to the screw fixing part of the speaker mounting part with a screw, and the urging force of the U-shaped bent part of the fixing bracket is used. A speaker unit has been proposed in which a speaker unit is pressed against a wall panel and vibration is absorbed by the spring property of a U-shaped bent portion (Patent Document 1).

  In addition, a holding part for the fixing member is formed outside the supporting part on the inner surface of the cabinet, the fixing member having a U-shaped cross section is held by the holding part, a speaker is placed on the supporting part via a cushion material, and the speaker is attached. There has also been proposed an acoustic device in which a flange is fixed to a fixing portion with screws and the chatter noise is prevented from being generated by the elasticity of the fixing portion having a U-shaped cross section (Patent Document 2).

  In addition, a front cushioning material is arranged between the supported part of the front part of the speaker unit and the supporting part of the front case, and a rear cushioning material is arranged between the rear part of the speaker unit and the rear wall surface of the rear case. In addition, a speaker unit mounting structure has been proposed in which a front housing and a rear housing are fastened with screws at a fastening portion so that unnecessary vibration transmitted from the speaker unit to the housing is attenuated by a buffer material (patent) Reference 3).

  In addition, the first piece and the second piece of the folded rubber member are placed on the upper and lower surfaces of the speaker mounting part, and this mounting part is placed on the receiving boss on the back of the front cabinet and fixed with screws. There is also known a speaker mounting structure in which vibration of the speaker is prevented from being transmitted to the cabinet by a rubber member (Patent Document 4).

  Further, the cylindrical elastic body is fitted to the fixing protrusions provided on both side surfaces of the speaker case, and the rod-shaped member provided on the first panel of the device is inserted into the cylindrical elastic body, whereby the second panel of the device There is also known a speaker fixing structure in which a rod-like member is inserted into a cylindrical member provided on the speaker and a cylindrical elastic body is sandwiched between a first panel and a second panel (Patent Document 5).

JP 2010-93593 A JP 2009-100408 A JP 2009-16946 A JP 2008-258754 A JP 2008-244908 A

  However, since the speaker fixing structures of Patent Documents 1, 2, and 4 are all fixed to a television cabinet or the like using screws or screws, the fixing work of the speakers is cumbersome, and screws and screws are not used. However, the problem of being expensive remains.

  Further, the speaker fixing structure of Patent Document 5 does not use screws or the like, so the above problem is temporarily solved. However, the vibration of the speaker can be achieved only with a cylindrical elastic body fitted to the fixing protrusions on both sides of the speaker case. Therefore, it is difficult to prevent the chatter noise, and the operation of inserting the rod-shaped member into the cylindrical member is difficult because the alignment is difficult.

  In addition, the speaker fixing structure of Patent Document 3 includes a speaker unit and a cushioning material sandwiched between the front housing and the rear housing, and the front housing and the rear housing are fastened with screws at the fastening portion. The box-type speaker itself is assembled so that the vibration of the speaker unit is not easily transmitted to the housing, and the speaker is not fixed to a television cabinet or the like.

  The present invention has been made under the above circumstances, and the problem to be solved is that screws and screws are not required and the speaker can be fixed easily and reliably, and the vibration of the speaker is almost transmitted to the cabinet and the liquid crystal display module. It is intended to provide a speaker fixing structure for a liquid crystal television set that can sufficiently prevent the occurrence of so-called “billing noise” because it is absorbed and attenuated so as not to occur.

  In order to solve the above problems, a speaker fixing structure of a liquid crystal television according to the present invention is a liquid crystal in which a cushion material is attached to the front and back of a speaker box, and the speaker box is installed in the liquid crystal television via the cushion material. It is characterized by being sandwiched and fixed from the front and rear by the rear frame of the display module and the rear cabinet of the liquid crystal television.

  In the speaker fixing structure of the present invention, the protrusion insertion portions are formed on both sides of the speaker box, the positioning protrusion formed on the rear frame of the liquid crystal display module is inserted into the protrusion insertion portion, and the protrusion insertion portion and the positioning protrusion It is preferable to position the speaker by providing a cylindrical cushioning material between them.

  And it is preferable to make the cross-shaped rib projecting on the inner surface of the rear cabinet close to the cushion material stuck on the front surface of the speaker box, and the convex rib provided on the inner surface of the rear cabinet is connected to the front surface of the speaker box. It is also preferable to bite into the cushion material stuck to the.

  In the speaker fixing structure of the present invention, the vibration of the speaker is absorbed and attenuated by the cushioning material attached to the front and back of the speaker box so that the vibration of the speaker is hardly transmitted to the rear frame of the liquid crystal display module and the rear cabinet of the liquid crystal television. Therefore, it is possible to sufficiently prevent the occurrence of so-called “billing noise” due to speaker vibration. Moreover, because the speaker box is sandwiched and fixed from the front and rear by the rear frame of the liquid crystal display module and the rear cabinet of the liquid crystal television through this cushion material, screws and screws are unnecessary, so you can save parts costs such as screws, The troublesome screwing work can be omitted and the speaker can be fixed efficiently. Further, when chatter noise caused by speaker vibration is prevented as in the speaker fixing structure of the present invention, it is not necessary to attach a cushioning material such as non-woven fabric at the location where chatter noise is generated, which is necessary for studying chatter noise. Since the time is also shortened, there is an advantage that the design efficiency is improved.

  In the speaker fixing structure of the present invention, a positioning projection formed on the rear frame of the liquid crystal display module is inserted into the projection insertion portions on both sides of the speaker box, and a cylindrical cushioning material is provided between the projection insertion portion and the positioning projection. Speakers that have been positioned will not be displaced even when subjected to impacts, etc., and the vibrations of the speakers are absorbed by the cylindrical cushioning material so that they are not transmitted to the rear frame. There is no worry about it.

  Further, in the speaker fixing structure of the present invention, the positioning protrusion is formed by a cross-shaped rib projecting on the inner surface of the rear cabinet in the vicinity of the cushion material attached to the front surface of the speaker box. Even in the case where the projection is inserted from the protrusion insertion portion, the cushion material on the front of the speaker box can be supported by the cross-shaped rib to prevent the speaker from being displaced.

  Furthermore, in the speaker fixing structure of the present invention, the convex rib provided on the inner surface of the rear cabinet is bitten into the cushion material stuck to the front of the speaker box. There is an advantage that the positional deviation of the speaker with respect to the cabinet can be prevented more reliably.

It is a rear view which shows the liquid crystal television which employ | adopted the speaker fixing structure which concerns on one Embodiment of this invention, and fixed the speaker inside. It is a schematic sectional drawing along the AA line of FIG. It is an exploded view of the part which fixed the speaker. It is a front view of a speaker. It is the rear view of the speaker. It is the fragmentary view which looked at the rear cabinet of liquid crystal television from the inner side.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The speaker fixing structure of the liquid crystal television includes a box-shaped speaker 1 as shown in FIGS. 4 and 5, and a rear frame 3a of the liquid crystal display module 3 housed in the liquid crystal television 2 as shown in FIG. In this embodiment, as shown in FIG. 1, a pair of left and right speakers 1, 1 are arranged on the liquid crystal display near the left and right ends of the lower part of the liquid crystal television 2. The module 3 is mounted and fixed between the rear frame 3a and the rear cabinet 4 respectively.

  As shown in FIG. 4, the speaker 1 is a box-shaped speaker having a substantially rectangular parallelepiped speaker box 1a made of synthetic resin, and a circular opening formed at the center of the front surface 1b of the speaker box 1a. A cone 1d is exposed at 1c, and as shown in FIG. 5, a magnet 1f for driving the cone cone 1d protrudes from a hole at the center of the back surface 1e of the speaker box 1b. Projection insertion portions 1g and 1g for inserting positioning projections, which will be described later, are projected outwardly on the left and right side portions of the speaker box 1a, and these projection insertion portions 1g and 1g are made of a rubber elastic body or the like. Cylindrical cushioning materials 1h and 1h are respectively fitted. 4 and 5, 1 i indicates a lead wire to the speaker 1.

  On the front face 1b of the speaker box 1a of the box-type speaker 1, a pair of left and right cushion members 5A, 5A are disposed at substantially symmetrical positions on both the left and right sides of the circular opening 1c and are adhered with an adhesive or an adhesive. In addition, a pair of upper and lower cushion members 5B, 5B are disposed on the back surface 1e of the speaker box 1a at substantially symmetrical positions on the upper and lower sides of the magnet 1f and adhered with an adhesive or an adhesive. These cushion members 5A and 5B are arranged such that when the speaker 1 is mounted and fixed between the rear frame 3a and the rear cabinet 4 of the liquid crystal display module 3, the vibration of the speaker 1 causes the rear frame 3a of the liquid crystal module 3 and the liquid crystal television. It plays the role of absorbing and attenuating so as not to be transmitted to the rear cabinet 4. For example, a soft synthetic resin foam sheet or a rubber foam sheet having a thickness of about several millimeters is preferably used. These foam sheets may have open cells or closed cells.

  As shown in FIG. 3, on the rear frame 3a of the liquid crystal display module 3, a pair of left and right pin-shaped or boss-shaped positioning projections 3b corresponding to the projection insertion portions 1g on both sides of the speaker box 1a project rearward. When the speaker 1 is sandwiched and fixed between the rear frame 3a and the rear cabinet 4 from the front and rear, the positioning projection 3b is fitted to the projection insertion portions 1g on both sides of the speaker box 1a. And the speaker 1 is positioned. Therefore, there is no possibility that the position of the speaker 1 will be displaced even if it receives an impact or the like, and the cylindrical cushioning material 1h interposed between the protrusion insertion portion 1g and the positioning protrusion 3b causes the vibration of the speaker 1 to vibrate the liquid crystal display module. 3 is absorbed and attenuated so as not to be transmitted to the rear frame 3a.

  This liquid crystal display module 3 is provided with a backlight unit inside a rear frame 3a made of sheet metal, a liquid crystal display panel on the front side of the liquid crystal display panel via an optical sheet, and four bezels surrounded by a bezel. In order to avoid interference with the speaker 1, a recess 3 c is formed in the speaker fixing portion of the frame 3 a as shown in FIG. 3. A main substrate 6 is attached to the back surface of the rear frame 3a of the liquid crystal display module 3 as shown in FIG.

  As shown in FIGS. 1, 3 and 6, the speaker mounting portions on both sides of the lower portion of the rear cabinet 4 have a pair of left and right openings 4a and 4a that allow the exposed cone 1d of the speaker 1 to face and emit sound. The opening 4a, 4a is formed with protective pieces 4b, 4b that protect the cone 1d from external obstacles.

  6 and 3, a plurality of laterally protruding ribs 4c are formed on each of the left and right sides of the opening 4a on the inner surface of the rear cabinet 4, and the speaker 1 is connected to the rear frame 3a and the rear frame. When sandwiched from the front and rear by the cabinet 4 and fixed, these convex ribs 4c bite into the cushion materials 5A and 5A on the front of the speaker box 1a.

  Further, as shown in FIGS. 6 and 3, cruciform ribs 4d and 4d are provided on the left and right sides of the opening 4a on the inner surface of the rear cabinet 4, so that the speaker 1 is connected to the rear frame 3a and the rear cabinet 4. When these are sandwiched and fixed from the front and rear, the cross-shaped ribs 4d and 4d are brought close to the lower ends of the cushion materials 5A and 5A of the speaker box 1a.

  2 and 3, the speaker fixing structure of this embodiment is such that the front surface 1b of the speaker box 1a of the box-shaped speaker 1 on which the cushion material 5A is attached is directed toward the rear cabinet 4, and the speaker box 1a The back surface 1e with the cushion material 5B attached is directed to the rear frame 3a side of the liquid crystal display module 3, the speaker 1 is overlaid on the rear frame 3a of the liquid crystal display module 3, and the pair of positioning projections 3b of the rear frame 3a are connected to the speaker box. The speaker 1 is positioned by being inserted into the cylindrical cushioning material 1h fitted to the protrusion insertion portions 1g on both side portions 1a, and the lip portion of the circular opening 1c exposing the cone 1d of the speaker box 1a is arranged at the rear cabinet. The rear cabinet 4 is stacked from the rear while being fitted into the bulged opening 4a of the speaker 4, and the speaker Is pressed between the rear frame 3a and the rear cabinet 4 from the front and rear, and the cushion members 5A and 5B are pressed against the rear cabinet 4 and the rear frame 3a in a compressed state, respectively, and the convex ribs 4c of the rear cabinet 4 are cushioned. The speaker 1 is fixed by cutting into the material 5A and simultaneously bringing the cross-shaped rib 4d close to the cushion material 5A.

  With such a speaker fixing structure, the vibration of the speaker 1 is caused by the cushioning materials 5A and 5B attached to the front surface 1b and the back surface 1e of the speaker box 1a, and the rear frame 3a of the liquid crystal display module 3 and the rear cabinet 4 of the liquid crystal television. Therefore, it is possible to sufficiently prevent the occurrence of “billing noise” due to the vibration of the speaker 1. In addition, since screws and screws are not required, the cost of parts such as screws can be saved, and the fixing work of the speaker 1 can be performed efficiently without a troublesome screwing operation.

  Further, the positioning projection 3b formed on the rear frame 3a of the liquid crystal display module 3 is inserted into the cylindrical cushioning material 1h fitted to the projection insertion portions 1g on both sides of the speaker box 1a to position the speaker 1. Therefore, even if an impact or the like is received, the speaker 1 is not displaced, and the vibration of the speaker is absorbed by the cylindrical cushioning material 1h, so that no chatter noise is generated.

  Further, since the cross-shaped rib 4d on the inner surface of the rear cabinet 4 is placed close to the cushion material 5A attached to the front surface 1b of the speaker box 1a, the positioning projection 3b receives the large impact and the positioning projection 3b Even if it may deviate from the above, the cushion material 5A can be supported by the cross-shaped ribs 4d to prevent the speaker 1 from being displaced.

  And since the convex rib 4c provided in the inner surface of the rear cabinet 4 is made to bite into the cushion material 5A of the front of the speaker box 1a, the position shift of the speaker 1 with respect to the rear cabinet 4 can be prevented more reliably.

  In addition, when chatter noise caused by vibration of the speaker 1 is prevented as in this speaker fixing structure, it is not necessary to attach a cushioning material such as a nonwoven fabric at the location where the chatter noise is generated, and the time required for examining chatter noise. Therefore, there is an advantage that the design efficiency is improved.

  As described above, the speaker fixing structure of the present invention has been described with reference to typical embodiments. However, the present invention is not limited to this embodiment. For example, the cushion material 5A is formed in a circular shape on the front surface 1b of the speaker box 1a. Various design changes are allowed, such as a configuration in which the front surface 1b is adhered except for the opening portion 1c, and a cushion material 5B is also configured in a configuration in which the cushion material 5B is adhered to substantially the entire surface of the back surface 1e. Needless to say you get.

DESCRIPTION OF SYMBOLS 1 Speaker 1a Speaker box 1b The front of a speaker box 1e The back of a speaker box 1g Protrusion insertion part 1h Cylindrical shock absorbing material 2 Liquid crystal television 3 Liquid crystal display module 3a Rear frame of liquid crystal display module 3b Positioning protrusion 4 Rear cabinet 4c Convex rib 4d Cross shape Rib 5A Cushion material affixed to the front of the speaker box 5B Cushion material affixed to the back of the speaker box

In order to solve the above problems, a speaker fixing structure of a liquid crystal television according to the present invention is a liquid crystal in which a cushion material is attached to the front and back of a speaker box, and the speaker box is installed in the liquid crystal television via the cushion material. The speaker box includes a circular opening for exposing a cone included in the speaker box, and the outer edge of the circular opening is located at the rear. It is configured to be fitted into a concave fitting portion having an opening provided so as to protrude rearward from the cabinet .

And it is preferable to make the cross-shaped rib projecting on the inner surface of the rear cabinet close to the cushion material adhered to the front of the speaker box, and the cushion material between the front and back of the speaker box sandwiches the speaker. It is a pair of cushioning materials affixed to the position, the pair of cushioning materials on the front are stuck to the left and right, the pair of cushioning materials on the back are stuck up and down, and the convex ribs provided on the inner surface of the rear cabinet, It is also preferable to bite into a cushion material attached to the front of the speaker box.

Claims (4)

  Cushion material is attached to the front and back of the speaker box, and the speaker box is sandwiched and fixed from the front and back by the rear frame of the liquid crystal display module and the rear cabinet of the liquid crystal television. A speaker fixing structure for LCD TVs.   Protrusion insertion parts are formed on both sides of the speaker box, and positioning protrusions formed on the rear frame of the liquid crystal display module are inserted into the protrusion insertion part, and a cylindrical cushioning material is provided between the protrusion insertion part and the positioning protrusions. The speaker fixing structure according to claim 1, wherein the speaker is positioned.   The speaker fixing structure according to claim 1 or 2, wherein a cross-shaped rib projecting from the inner surface of the rear cabinet is placed close to a cushion material attached to the front surface of the speaker box.   The speaker fixing structure according to any one of claims 1 to 3, wherein a convex rib provided on the inner surface of the rear cabinet is bitten into a cushion material attached to the front surface of the speaker box.

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